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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.11 [2004] >
IJEMS Vol.11(6) [December 2004] >
| Title: | Property analysis and mathematical modeling of machining properties of aluminium alloy hybrid (Al-alloy/SiC/flyash) composites produced by liquid metallurgy and powder metallurgy techniques |
| Authors: | Charles, S
Arunachalam, V P |
| Issue Date: | Dec-2004 |
| Publisher: | CSIR |
| IPC Code: | C22C 49/06 |
| Abstract: | Aluminium hybrid composites
reinforced with silicon carbide and flyash particulates were fabricated by stir
casting and powder metallurgy methods. Different volume fractions of SiC
particles (10, 15 and 20 vol%) and constant volume fraction of flyash (10 vol%)
were used for the synthesis. Wear, micro hardness, tensile and microstructural
properties were studied. Results of the investigations indicated that wear
resistance and hardness were enhanced on increasing the vol% of SiC. The
tensile strength was high at 10 vol% of SiC and it decreased as the vol%
increased. Microstructure showed a fairly uniform distribution of the
dispersoids. Electric discharge machining was done on the composite specimens
and mathematical models were developed for predicting the material removal rate
and tool wear rate using design of experimentation with current, pulse duration
and vol% of SiC as the process variables. Curves describing the direct and
interaction effect of the process variables were drawn. It was found that the
material removal rate and tool wear rate increased with increase in current and
decreased with increase in pulse duration and vol% of SiC. The behaviour of the
composites was similar both for powder metallurgy and stir casting, except the
fact that stir cast specimens exhibited higher hardness, wear resistance and
tensile strength. This increase can be attributed to the close interfacial
bonding of stir cast specimens. |
| Page(s): | 473-480 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.11(6) [December 2004]
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